Daihatsu F300 Service Manual page 1355

Hide thumbs Also See for F300:

Table of Contents

EMISSION CONTROL SYSTEM

POSITIVE CRANKCASE VENTILATION SYSTEM (PCV)

To combat air-pollution problems, the engine is equipped with a sealed type positive crankcase ventilation

system in order to prevent blow-by gases generated inside the crankcase from being released into the

The blow-by gases generated inside the crankcase flow into the cylinder s"1de through the gas path of the

cylinder block. When the opening degree

the throttle valve is small, oil in the blow-by gases is separated

by the oil separator provided at the cylinder head cover. Then, the blow-by gases are sucked into the

cylinders from the throttle body to be burnt again.

Fresh air enters the cylinder head cover from the upstream path of the throttle valve. At this time, the air flow

rate is regulated by a jet provided at the cylinder head cover. thus stabilizing the engine idling. When the

opening degree of the throttle valve is _large and/or when a large amount of blow-by gases are generated,

the blow-by gases are sucked into the combustion chambers both through the upstream path and the

downstream path of the throttle valve.

INSPECTION OF PCV HOSE & CONNECTION

Visual inspection of hoses and connections check the hoses

and connections for cracks, leakage or damage.

It any parts exhibit fault, replace or repair them, as required.

.. Blow-by gas

Chapters

Table of Contents